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adding the [^] pattern

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Kin Lum 2020-01-29 13:43:35 -08:00 • committed by GitHub
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9-regular-expressions/02-regexp-character-classes/article.md
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@ -156,6 +156,8 @@ alert( "A\nB".match(/A[\s\S]B/) ); // A\nB (match!)
The pattern `pattern:[\s\S]` literally says: "a space character OR not a space character". In other words, "anything". We could use another pair of complementary classes, such as `pattern:[\d\D]`, that doesn't matter. The pattern `pattern:[\s\S]` literally says: "a space character OR not a space character". In other words, "anything". We could use another pair of complementary classes, such as `pattern:[\d\D]`, that doesn't matter.
This trick works everywhere. Also we can use it if we don't want to set `pattern:s` flag, in cases when we want a regular "no-newline" dot too in the pattern. This trick works everywhere. Also we can use it if we don't want to set `pattern:s` flag, in cases when we want a regular "no-newline" dot too in the pattern.
Also worth mentioning is, besides `[\s\S]`, there is another regular expression that can match any character, which is `[^]` -- it means match any character except nothing, and that means to match any character without exception. `[^]` and `[\s\S]` are the two typical regular expressions to solve the missing of `s` flag problem.
```` ````
````warn header="Pay attention to spaces" ````warn header="Pay attention to spaces"